Warper



C. D. BROWN May 6, 1930.

WARPER Filed Dec. 21, 1928 2 Sheets-Sheet l Invenror.

Carl D. Brown bymMkW C. D. BROWN May 6, 1930.

WARPER Filed Dec. 21, 1928 2 Sh68tS-5h8et 2 lnvenror. Carl D. Brown bymWyW Atty:

Patented May 6, 1930 UNITED STATES PATENT OFFICE CARL I). BROWN, OFHOPEDALE, MASSACHUSETTS, ASSIGNOR TO DRAPER CORPORATION, OF HOPEDALE,MASSACHUSETTS, A CORPORATION OF MAINE WABPER Application filed December21, 1928. Serial No. 327,547.

This invention relates to a warper for winding warp yarns drawn from asuitable supply such asa creel onto a warp beam of that type in whichthe Warp beam rests against a P driving drum and is rotated by thefrictional a construction in this type of warper which,

will enable the warper to be run at the high speeds now demanded by thetrade. WVhen a warper of this type is run at high speed, the warp beamfrequently jumps and vibrates, injuring the yarn more or less andpreventing the yarn mass being wound under even tension and with thedesired degree of homogeneity.

his the object of the present invention further to providefriction-controlled means acting to prevent such jumping or vibration Iof the warp beam in which the amount of friction shall be graduallyreduced as the total weight of the beam increases due to the increase inthe weight of the yarn mass as the winding operation proceeds.

It is the further object of the invention to provide such a constructionin which the friction-controlled means acts upon any movement of thebeam toward the driving drum to present a greater resistance at the endof such movement than at the beginning to a continued or furthermovement of the beam away from the driving drum so that jumping orvibration of the beam is reduced to the minimum.

It is the further object of the invention to provide for the adjustmentof the frictioncontrolled means to accord withthe condi tions prevailingin a particular warper and also to provide means for enabling the beamto be doffed and a fresh beam put in place without disturbing theadjustments.

The object of the invention is further to provide a simple, eilicientand durable form of construction operating upon the friction controlprinciple for enabling this type of warper to be run at high speedWithout deleterious jumping or vibration of the beam.

These and other objects and features of the invention will appear morefully from the accompanying description and drawings and will beparticularly pointed out in the claims. Since the invention is concernedsolely with the control of the warp beam during the winding operation,the preventing of the jumping or vibration of the Warp beam and theprovisions for dotting the warp beam, and as the other features andmechanisms of the warper may be of any suitable construction and form,and as the general principle and operation of a warper are well-knownand familiar to those skilled in the art, it is only necessary here toillustrate and describe those portions of awarper directly concernedwith one preferred form of embodiment of the present invention.

In the drawings:

l is a side elevation of a warper with j a simple and preferredform ofthe invention embodied therein and with elements of the warper notconcerned with the present invention omitted.

2 is a view on a larger scale of the friction device shown in Fig. 1,partially in vertical cross section and looking at theside thereofopposite to that shown in Fig. 1.

Fig. 3 is a view in transverse cross section taken on the line 33 ofFig. 2.

Fig. 4 is a detail view showing a clamp connection at one end of thefriction band.

The warper comprises end frames such as l standing on the floor 2. Ashaft. 3 mounted in suitable hearings n the end frames supports theusual driving drum 4 and is driven at high speed in any suitable mannerfrom a suitable source of power. The warp beam may be of any suitabletype comprising the of the drum with the beam barrel or the Warp massthereon rotates the beam, winding the warp yarns thereon. The yarn mass11 on the warp beam therefore gradually increases in diameter until thebeam is filled. Conse quently also the total weight of the beam and yarnmass likewise gradually increases.

. Any suitable means may be employed for supporting the warp beamgudgeons so as to enable the warp beam to rest against the driving drumand to move away from the driving drum as the yarn is wound on the beamby the frictional engagement of the drum therewith. Such means, as wellas the frictional controlling devices with which this invention isparticularly concerned, are desirably the same at both sides of thewarper so that it is sufficient to illustrate the construction at oneside. .The means for supporting the warp seam gudgeons is shown as of anordinary type. At each sideof the warper a supporting arm 12 ispivotally mounted on the stud 13 carried by a link 14 pivotedto thecrank 15. By turningthe shaft 16, through interposed and familiarmechanism not necessary here further to describe, the crank arm 15 isturned about its axis 17 to lower and raise the arms 12 for dotting andreplacing the beam. Each warp beam gudgeon 8 is supported in a bearingsleeve 18 seated in a hearing seat 19 formed on the supporting arm anda; bearing cap 20 pivoted at 21 serves to hold the bearing sleeve inplace. Thus it will be seen that as the warp yarns are wound on thebeam, the diameter of the warp mass increases and the supporting armsswing forward and upward as the beam moves away from the driving drum.

In this invention a frictional resistance is presented to control thismovement of the warp beam and this frictional resistance decreases asthe mass of yarn increases on the warp beam. It is desirablethat thereshall be no great variation throughout the winding operation in thepressure between the driving drum and the warp beam. Otherwise thecompactness of the warp mass will vary.

But as the total weight of the warp beam and yarn mass graduallyincreases from the beginning to the end of the winding operation, ifthis were the onlyfactor acting to cause pressure between the frictiondrum and the warp beam, this pressure would gradually increase. But witha friction-controlled device applied in addition to the warp beam; it'ispossible to control the total effective pres sure between the drivingdrum and the warp beam as required and preferably so as to maintain itsubstantially uniform throughout the winding operation. Consequently inthis invention the amount of friction acting to prevent movement of thewarp beam away from the driving drum is gradually reduced from thebeginning to the end of the winding operation so as to offset theincrease in'the weight of the warp beam and yarn mass.

A preferred form of construction embodying the invention is shown inFig. 1 and more in detail in Figs. 2 and 3 and, as noted, is

the same at both sides of the warper. A bracket 22 is bolted at 23 tothe side frame 1 and extends upwardly therefrom beneath the supportingarm 12. This bracket is formed to'present an extended bearing hub 24 andin this hub is rigidly mounted a stud 25 extending parallel with theaxes of the driving drum and warp beam. A friction drum 26 having theannular flange 27 and a base 28 is secured'to the bracket 22 and is w inplace by a nut 35. This anchor stud extends transversely across andadjacent the flange 27 of the friction drum. A helical spring 86surrounds the hub 32 of thearm and has one end 37 connected to the huband the other end 38 connected to a collar 39 mounted and rotarilyadjustable on the end of the stud 25 by means of a removable pin 40extending through aligned holes in the collar and stud.

A friction band is connected at one end to the stud 33 on the arm 31 andextends therefrom encircling the friction drum and at its otherend isconnected to the supporting arm 12. This friction band may be of anysuitable material for the purpose. As illustrated, it comprises a heavyfabric strap 41, an intermediate steel strip 42 and a cork facing'43. Atthe anchor end the steel strip 42 is bent into a loop around the stud33,

back upon the main body of the friction band 1 s and all the layers arethere secured together by rivets 44. At some distance from'this end asuitable clamping member 45v holds the component parts of the frictionband to gether, but from there on the strap 41 is free to separate fromthe other members of the band which are secured together at theiropposite ends by a rivet 46. The other end of the strap 41 passesthrough the looped end .47 of a rod 48 'and'is bent back upon the bodyof they strap and clamped thereto between two plates 49 which are drawntogether by bolts 50 passed through the plates adjacent the edges of thestrap. The rod 48 extends throughbifurcatcd lugs 51 projecting fromthebearing seat and bearing cap of the supporting arm and has pivoted toit at its upper end 52 a cam lever 53.

Stops for limiting the rotary movement of the arm 31 in eitherdirectionare provided 23:.

warp beam or supporting arm away from the and are shown as lugs 54 and55 formed integral with and projecting from the base 28 of the frictiondrum.

The anchor stud 33 for the end of the friction band movescircumferentially of the fixedly mounted friction drum and the spring 36acts yieldingly to move this anchor for the friction band in a directionopposite to the pull exerted by the warp beam through the friction bandas the winding operation pro ceeds and the warp beam moves away from thedriving drum. This spring 36 may be adjusted by rotarily adjusting thecollar 39 so as to vary the tension exerted thereby on the friction bandbut when once adjusted the amount of resistance to the movement of thedriving drum will be substantially dependent upon the length of the arcof the friction drum engagedby the friction band. When the beam is emptyand the winding operation is about to begin, the length of this are maybe adjusted by adjustingthe rotary position of the friction drum bymeans of the bolts 29 and by making the length of the friction band suchas when connected to the supporting arm to stand taut. Then as thewinding operation proceeds and the supporting arm moves away from thedriving drum, the friction band steadily slips around the friction drum,drawing the anchor with it and coin sequently gradually diminishing thearc of its engagement with the friction drum. Consequently it will beseen that as the total weight of the beam and yarn mass increases, thefrictional resistance opposed by this invention to the movement of thebeam away from the driving drum decreases and the relation between therate of increase and the rate cf decrease may beifixed as desired byproquently permitting the spring 36 to act to move the anchor in thedirection opposite to the direction of pull on the friction band andconsequently increase the length of the arc of the friction drumencircled by the friction band. It will be seen, therefore, that thedevice acts to neutralize or prevent jumping or vibration on the warpbeam. Any such movement of the warp beam necessarily in volves both amovement away from and a movement toward the driving drum. The formermeets the powerful resistance of the friction device while the latter,because of the principle just set forth, results in a greater resistancebeing presented to any continued or further movement of the beam awayfrom the driving drum.

The invention thus presents a friction-controlled means resisting with agradually reducing amount of friction the movement of the beam away fromthe driving drum and further acting to neutralize or prevent jump in orvibration of the beam as when running at high speed.

iv hen the beam has been wound full of yarn and it is desired to dolfthe beam, the friction device will be exerting the minimum amount offriction. By seizing the free end of the lever 53 and rocking its camend about theprojecting end of the upper lug 51, the bar i8 is readilypried out free from both lugs 51, thus freeing the beam supports fromthe friction device. -When a fresh beam is placed in position, thereverse operation is performed lthelever 53 in this case acts to stretchthe iC'lilOl'l band firmly into initial position.

Having thus described the invention, what is claimed as new, and desiredto be secured by Letters Patent, is

l. A warper comprising a driving drum, n warp beam supported to restagainst the drum and to move away from the drum as the yarn is wound onthe beam by the frictional engagement of the drum therewith, a fixedlymounted friction drum, an anchor movable oircumferentially of thefriction drum, a friction band connected at one end to the beam,encircling the friction drum and connected at the other end to theanchor, and means for yieldingly moving the anchor in a directionopposite to'the pull exerted by the beam on the friction band.

2. A warper comprising a driving drum, a warp bear 1 supported to restagainst the drum and to move away from the drum as the yarn is wound onthe beam by the frictional engagement of the drum therewith, a fixedlymounted friction drum, an anchor movable circumferentially of thefriction drum, a friction band connected at one end to the beam,engaging an extended are of the friction drum and connected at the otherend to the anchor, and means for yieldingly resisting the movement ofthe anchor due to the pull of the friction band by the warp beam, thesaid movement of the anchor due to said pull acting gradually to diminshthe length of the arcof the friction drum engaged by the friction bandand thereby the resistance to the movement of the beam away from thedriving drum and the said yielding means acting to move the anchor inthe opposite direction upon any movement of the beam toward the frictiondrum thus to neutralize vibration of the beam.

3. A warper comprising a driving drum, a warp beam supported to restagainst the drum and to move away from the drum as the yarn is wound onthe beam by the frictional engagement of the drum therewith, a

fixedly mounted friction drum, an anchor movable circumferentially ofthe friction drum, a friction band connected at one end to the beam,encircling the friction drum and connected at the other'end to theanchor, means for yieldingly moving the anchor in a direction oppositeto the pull exerted by the beam on the friction band, and means foradjustably limiting the movement of the an hor in said direction. p

4. A warper comprising a driving drum, a warp beam supported torestrvagainst the drum and to move away from the drum as the yarn iswound on the beam by the frictional engagement of the drum therewith, afixedly mounted friction drum, anv anchor movable circumferentially ofthe friction drum, a friction band connected at one end to the beam,encircling the friction drum and connected at the other end to the:anchor,

'means for yieldingly moving the anchor in a direction opposite to thepull exerted by the beam on the friction band, a stop lug on the drumfor limiting the movement of the anchor in the said direction,'and meansfor rotarily adjusting the position of the friction drum thus to adjustthe position of said stop lug.

5. A warper comprising a driving drum, 1 warp beam supported torestagainst the drum and to move away from the drum as the yarn is woundon the beam by the frictional engagement of the drumtherewith, a fixedlymounted frictionv drum, an anchor *novable' circumferentially of thefriction drum, a friction band connected at one end to the beam,encircling the-friction drum and connected at the other end to theanchor, a spring acting to move the anchor in a direction opposite tothe pull exerted by the beam on the friction band and means foradjusting the tension of said spring.

6. A warper comprising a driving drum, a warp beam supported to restagainst the drum and to move away from the drum as the yarn is wound onthe beam by the frictional engagement of the drum therewith, a fixedlymounted friction drum, a stud extending axially of the friction drum, anarm iournalled on the-stud and having its ends extending across theperiphery of the fric-,

tion drum to form an anchor, a helical spring on the stud secured at oneend to the arm and at the other end to the stud and a friction bandconnected at one end to thebeam, encircling the friction drum andconnected at the other end to the anchor.

EA warper comprising the construction defined in claim 6, in which acollar is provided rotarily adjustably mounted on the stud and in whichthe helical spring is secured to the collar and thus to the stud, thusenabling the tension of the spring to be: adjusted'.

8. A warper comprising a driving drum,

a warp beam, a support for the warp beamacting to hold the warp beamresting against the drum and to movewiththe warp beam away from the drumas the yarn is Wound on the beam by the frictional engagement of thedrum therewith, a cam device detachably mounted on the said support, afixedly mounted riction drum, an anchor movable circumferentially of thefriction drum, a friction band connected at one end tothe camdevice,encirclin g the friction drum and connected at the other end tothe anchor, and means for yieldingly moving the anchor in a directionopposite to thepull exerted on the friction band, the cam device when inworking position acting to hold the friction band taut and when moved todetaching po sition acting to relieve the strain on the friction band. I

9. A warper comprising a driving drum, a warp beam having gudgeons, asupport for the warp beam acting to hold the warp beam resting againstthe drum and to move with the warp beam away from the drum as the yarnis Wound on the beam by the frictional engagement of thedrum therewith,the said support having a bearing seat and a bearing cap for the warpbeam gudgeon, a cam lever carried by the support, a fixedly mountedfriction drum, an anchor movable circumfercntially ofthe friction drum,a friction band connected at one'end-to the cam lever, encircling thefriction drum and connected at the other end to the anchor, and meansfor yieldingly moving the anchor in a direction opposite to thepullexerted on the friction band, the cam lever acting when in workingposition to lock the bearing cap in position and to hold the frictionband taut and acting when swung to-doffing position to release thebearing cap and also to release the strain on the friction band.

In testimony whereof, I have signed my name to this specification.

CARL 1); BROWN.

